*{
    margin:0;
    padding:0;
    list-style:none;
}

html,body{
    width:100%;
    height: 100%;
    overflow: hidden;
}

.wrap{
    width:100%;
    height: 100%;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.header,.footer{
    width:100%;
    height: 44px;
    background: gray;
    line-height: 44px;
}

.con{
    flex:1;
    width:100%;
}
.header{
    text-align: center;
}

.footer{
    display: flex;
    justify-content:space-between;
}

.list{
    width:100%;
}

.list li{
    width:100%;
    height: 44px;
    border-bottom:1px solid gray;
}